Recently I might add.
Have you guessed yet?
Yes? You know?
No? You don't?
Well folks it was Cuba which lost about 50% of its oil imports when the Soviet Union closed shop.
There's a little documentary that examines how this nation dealt with that massive shock on transportation, agriculture and home power.
See it
here.
Better yet
here is a great article on the situation and the film.
"Scarce petroleum supplies have not only transformed Cuba's agriculture. The nation has also moved toward small-scale renewable energy and developed an energy-saving mass transit system, while maintaining its government-provided health care system whose preventive, locally-based approach to medicine conserves scarce resources.
The era in Cuba following the Soviet collapse is known to Cubans as the Special Period. Cuba lost 80 percent of its export market and its imports fell by 80 percent. The Gross Domestic Product dropped by more than one third.
"Try to image an airplane suddenly losing its engines. It was really a crash," Jorge Mario, a Cuban economist, told the documentary crew. A crash that put Cuba into a state of shock. There were frequent blackouts in its oil-fed electric power grid, up to 16 hours per day. The average daily caloric intake in Cuba dropped by a third."
Of course reletively poor small island nations would get hit worse that the almighty U.S. of Fuckin' A but it might behoove us to at least attempt to understand what needs to be done in a "down" time...